ADAR1 funds boost Rallybio (RLYB) stake with May open-market buys
Filing Impact
Filing Sentiment
Form Type
4
Rhea-AI Filing Summary
Rallybio Corp reported insider-related buying activity by entities associated with ADAR1 Capital Management, LLC and Daniel Schneeberger. Private funds and separately managed accounts managed by ADAR1 purchased a total of 79,559 shares of Rallybio common stock in open-market transactions on May 13, 2026 and May 15, 2026.
Reported purchase prices ranged from $13.7700 to $14.0000 per share, with some trades disclosed on a weighted-average basis. The filing states these securities are owned directly by ADAR1-managed investment vehicles and may be deemed indirectly beneficially owned by ADAR1 and Schneeberger, who each disclaim beneficial ownership except to the extent of any pecuniary interest.
Positive
- None.
Negative
- None.
Insider Trade Summary
Net Buyer: 79,559 shares ($1,112,977)
Net Buy
4 txns
Insider
ADAR1 Capital Management, LLC, Schneeberger Daniel
Role
null | null
Bought
79,559 shs ($1.11M)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Purchase | Common Stock | 100 | $13.80 | $1K |
| Purchase | Common Stock | 200 | $13.95 | $3K |
| Purchase | Common Stock | 4,081 | $13.7993 | $56K |
| Purchase | Common Stock | 75,178 | $14.00 | $1.05M |
Holdings After Transaction:
Common Stock — 909,943 shares (Indirect, See Footnote)
Footnotes (1)
- The reported price is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.7700 to $13.8000, inclusive. Each Reporting Person undertakes to provide to Rallybio Corp, any security holder of Rallybio Corp or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The reported securities are owned directly by private investment funds managed by ADAR1 Capital Management, LLC and separately managed accounts of ADAR1 Capital Management, LLC, and may be deemed to be indirectly beneficially owned by (i) ADAR1 Capital Management, LLC and (ii) Daniel Schneeberger, the sole manager of ADAR1 Capital Management, LLC. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.
Key Figures
Net shares bought: 79,559 shares
Largest single purchase: 75,178 shares
Additional purchase: 4,081 shares
+3 more
6 metrics
Net shares bought
79,559 shares
Total open-market purchases reported across four transactions
Largest single purchase
75,178 shares
Common stock bought on May 13, 2026 at $14.0000
Additional purchase
4,081 shares
Common stock bought on May 13, 2026 at $13.7993
Smaller transaction
200 shares
Common stock bought on May 15, 2026 at $13.9500
Additional small trade
100 shares
Common stock bought on May 15, 2026 at $13.8000
Post-trade holding example
910,143 shares
Total shares following one reported transaction, indirect ownership
Key Terms
open-market purchase, weighted average price, beneficial ownership, pecuniary interest, +1 more
5 terms
open-market purchase financial
"transaction_action": "open-market purchase""
An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.
weighted average price financial
"The reported price is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
beneficial ownership financial
"disclaims beneficial ownership of any such securities, except to the extent"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
pecuniary interest financial
"except to the extent of his/its pecuniary interest therein, if any"
Section 16 of the Securities Exchange Act of 1934 regulatory
"For purposes of Section 16 of the Securities Exchange Act of 1934, as amended"
A provision of federal securities law that requires company insiders—directors, officers and large shareholders—to publicly report their stock holdings and trades and to surrender any “short-swing” profits from purchases and sales within a six-month window. It acts like a rule that forces leaders to announce their trades and prevents quick buy-sell windfalls, giving investors transparency into insider activity and reducing opportunities for unfair gain.
